Bobbin



Dec. 1, 1931. J. F. MALCOLM BOBBIN Filed Jan Inventor finzasffi JDIaZe OZnz A ltomey Patented Dec. 1, 1931 UNITED STATES PATENT OFFICE JAMES F. MALCOLM, OF HANOVER, PENNSYLVANIA, ASSIGNOR TO REVONAH SPINNING- MILLS, OF HANOVER, PENNSYLVANIA BOBBIN Application filed January 29, 1931. Serial No. 512,125.

This invention relates to a bobbin and has for its primary object to provide, in a manner as hereinafter set forth, a bobbin embodying a novel construction for the prevention of slipping of the yarn therefrom before said yarn has been exhausted'from the bobbin, thus eliminating considerable waste and permitting continuous operation of the loom by tieing the end of the exhausting filling to the beginning of the new filling.

Other objects of the invention are to provide a bobbin of the character set forth which will be simple in construction, strong, durable, efficient and reliable in use and which may be manufactured at low cost.

All of the foregoing and still further ob-' jects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and

wherein I I Figure 1 is a view in side elevation of a bobbin constructed in accordance with this invention showing an exhausting yarn or filling thereon by a quick traverse wind.

Figure 2 is a longitudinal sectional View through the bobbin.

Figure 3 is a view in elevation looking at the lower end of the bobbin.

Referring to the drawings in detail, it will be seen that the bobbin comprises a tapered intermediate portion 1 having reduced portions 2 and 3 which merge with the longitudinally convexed portions 4 and 5, respectively. A head 6 is formed integrally with the lower end of the convex portion 4 and a tapered head 7 is formed integrally with the convex portion 5. The lower side of the base head 6 is provided with the usual socket 8. The bobbin is further provided, as usual, with the longitudinal bore 9. The junction of the reduced ends of part 1 with the adj acent ends of the convex parts 4 and 5 and the junction of the outer ends of the parts 4 and 5 with the heads 6 and 7 form annular grooves.

The highest points in the convex portions 4 and 5 are in the plane of the periphery of I the tapered intermediate portion 1. Certain of the quick traversing convolutions of the yarn 10 intersect or cross in the annular grooves or channels formed by the reduced portions 2 and 3 and the adjacent ends of the convex portions 4 and 5, as indicated at 11 in Figure 1 of the drawings and some of the yarn enters the grooves at the ends of the parts 4 and 5. Thus, the yarn is locked on the bobbin at the top and bottom of the traverse so that the yarn cannot work up or down on the bobbin and can only be removed in a circular direction by the effect of ballooning when being unwound.

This improved bobbin is mainly designed for use with quick traverse winds so that the yarnenters the grooves and does not bridge them and the grooves are so placed that the yarn crosses in the grooves, as shown at 11 in Fig. 1. The yarn being wound over the convex parts 4 and 5 and entering and cross ingin the grooves adjacent the intermediate parts 1 and the end wind entering the grooves adjacent the heads 6 and 7 is locked by such grooves and convex parts to the bobbin and is thus prevented from shifting on the bobbin.

It is believed that the many advantages of a bobbin in accordance with this invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction may be had which will. fall within the scope of the invention as claimed.

What is claimed is A bobbin for a quick traverse wind comprising a tapered intermediate portionhaving reduced ends and convex end portions having their inner ends connected with the reduced ends to form annular grooves, and a head on each end of the bobbin forming, with the outer end of the convex part, an annular groove, the intermediate groove being so placed that the yarn crosses therein with the end winds entering the end grooves, whereby the grooves and the convex part act to lock the yarn against slipping on the bobbin.

In testimony whereof I affix my signature.

JAMES F. MALCOLMY 

